Resource exhaustion in Lxsmnsyc Seroval
CVE-2026-116584
Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. From 1.4.1 until 1.6.8, fromJSON and fromCrossJSON do not require an array node's element list to be an actual array. A small crafted payload can supply an attacker-controlled length that determines memory allocation and decoder iterations independently of payload size, allowing an unauthenticated request to exhaust the process or block its thread. This issue is a residual bypass of the remediation for CVE-2026-23957. This issue is fixed in version 1.6.8.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Lxsmnsyc Seroval — versions >= 1.4.1, < 1.6.8
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-116584?
- CVE-2026-116584 is a high-severity vulnerability in Lxsmnsyc Seroval, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-10-26.
- How severe is CVE-2026-116584?
- High severity. CVSS v3 base score is 7.5 out of 10.